2015 Pan American Health Care Exchanges (PAHCE)最新文献_第3页

Algorithm to estimate the level of elasticity of biological tissue with ultrasound elastography images 基于超声弹性成像的生物组织弹性水平估计算法

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173317

J. J. Diaz, N. P. Castellanos, C. Pineda, C. Hernández, L. Ventura, J. Gutierrez

引用次数: 1

Power meter for HIFU transducers using logarithmic amplifiers 使用对数放大器的HIFU换能器功率计

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173353

S. Delgado, L. Leija, A. Vera

引用次数: 0

Methodology for metrological confirmation in health care institutions 卫生保健机构计量确认方法

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173342

J. H. García, A. M. Hernandez, J. G. Barreneche

{"title":"Methodology for metrological confirmation in health care institutions","authors":"J. H. García, A. M. Hernandez, J. G. Barreneche","doi":"10.1109/PAHCE.2015.7173342","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173342","url":null,"abstract":"The metrological confirmation is one of the most widely used methodologies for guaranteeing the correct performance of biomedical equipment. This methodology consists of calibration, maintenance, and set-up with recalibration. Also, the correct selection of the equipment to be calibrated, maintenance frequencies, maximum allowed error and actions to be taken, makes crucial to have accurate methodologies for decision making, due to the high economic and social costs that a failure represents. The metrological confirmation model proposed in this paper is presented through following sections: (i) the characteristics of the equipment to be evaluated are defined, (ii) parameters for selecting the equipment to be calibrated, calibration frequencies and actions to be taken are established; and (iii) the cost of the metrological control is evaluated and the most convenient modality for the institution is defined. As a result, a model that allows designing and controlling the metrology process is proposed; also, this model permits simulating the creation of a laboratory, and taking decisions to make changes from processed real data.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123081665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Raman spectroscopy analysis of a flexible and electrically conductive material with applications as ECG electrode 拉曼光谱分析一种具有柔性和导电性的材料，应用于ECG电极

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173332

L. M. Rivera, A. Betancur, J. Bustamante, L. Hoyos

引用次数: 5

HMM-GMM model's size selection methodology for bioacoustics-based diagnostic classification 基于生物声学诊断分类的HMM-GMM模型尺寸选择方法

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173331

P. Mayorga, D. Ibarra, C. Druzgalski, V. Zeljkovic

{"title":"HMM-GMM model's size selection methodology for bioacoustics-based diagnostic classification","authors":"P. Mayorga, D. Ibarra, C. Druzgalski, V. Zeljkovic","doi":"10.1109/PAHCE.2015.7173331","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173331","url":null,"abstract":"This paper presents a methodology for optimized utilization of merged Hidden Markov Models and Mixed Gaussian Model to classify lung sounds (LS) and heart sounds (HS) as a part of cardiopulmonary diagnostic assessment. Specifically this method was used as a criterion to determine most advantageous number of clusters for the HMMGMM model calculation. For this purpose, the LS and HS characteristics were evaluated in terms of MFCC (Melfrequency cepstral coefficients) and Quantile vectors. The analysis for the number of clusters was based on utilization of dendrograms, silhouettes, and the Bayesian Information Criterion (BIC). The merged HMM-GMM models for LS signals with Quartiles offered excellent results, while for HS signals, the best results were obtained with MFCC vectors. In both groups of LS and HS signals, a high degree classification efficiency was obtained reaching 100% for studied sets of signals. In particular, the results demonstrate that utilizing BIC or dendrograms as a part of optimized criterion enhances efficiency of merged HMM-GMM models in diagnostic classification of cardiopulmonary acoustic signals.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115180042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Coherent self-averaging for the pre-processing of surface electromyography signals in the detection of nociceptive withdrawal reflexes 损伤性戒断反射检测中表面肌电信号预处理的相干自平均

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173324

R. Espinosa, C. Tabernig

{"title":"Coherent self-averaging for the pre-processing of surface electromyography signals in the detection of nociceptive withdrawal reflexes","authors":"R. Espinosa, C. Tabernig","doi":"10.1109/PAHCE.2015.7173324","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173324","url":null,"abstract":"This work presents an alternative method for the pre-processing of surface electromyography signals of nociceptive withdrawal reflexes, with the goal of improving the reflexes detection in the records. The withdrawal reflex appears when a painful stimulus activates the nociceptors, the generated potential travels to the spinal cord and then the withdrawal of member exposed to painful stimulus is happened. The method used in this study to pre-process these reflexes is called a Coherent Self-Averaging method which attenuates the fluctuations of the random values of high frequency. The smoothing produced by the method is controlled by setting of two parameters: m and k. To demonstrate the performance in the detection of the reflex, 90 reflex signals of 15 healthy subjects were used. Its detection performance was compared with the one of the method called Teager-Kaiser energy operator. The reflex detection performance of algorithms was analyzed using the receiver operating characteristic curve. This showed that the Coherent Self-Averaging method, had a higher sensitivity and specificity than the Teager-Kaiser energy operator. Smoothing of signal, artifact attenuation (by electric stimulation) and reflex enhancement also was observed.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124298449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Respiratory muscle activity in patients with acute organophosphorus poisoning 急性有机磷中毒患者的呼吸肌活动

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173341

M. B. S. Sánchez, A. Hernandez, C. Cortés, A. Serpa, M. Mananas, Y. Agudelo

引用次数: 0

Force control and haptic interface applied to prototype of myoelectric prosthetic hand 力控制与触觉界面在肌电假手原型中的应用

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173344

E. R. Mancipe-Toloza, S. A. Salinas

引用次数: 2

Analysis of total cost of ownership (TCO) applied to processes of biomedical technology acquisition competitive intelligence 总拥有成本(TCO)在生物医学技术获取竞争情报过程中的应用

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173325

J. G. Barreneche, A. M. Hernandez, J. H. García

{"title":"Analysis of total cost of ownership (TCO) applied to processes of biomedical technology acquisition competitive intelligence","authors":"J. G. Barreneche, A. M. Hernandez, J. H. García","doi":"10.1109/PAHCE.2015.7173325","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173325","url":null,"abstract":"The assessment of biomedical technology framed in the Ministry of Social Protection Decree # 4725 of 2005 performed as part of the acquisition processes is of great importance for health care institutions in Colombia.. Medical technology, being costly and complex, requires detailed processes with rigorous methodologies that guarantee an accurate assessment and transparent acquisition process. The most important aspects to consider, although not the only one is the economic assessment, which has always had a great weight in the assessment processes, even when not many variables are considered and financial projections over time are not always carried out. This paper aims to incorporate variables as the Total Cost of Ownership (TCO), the technology life cycle, and the Net Present Value, in the process of economic evaluation. Additionally, the paper presents one of the most representative results obtained in the acquisition processes carried out during the last five years in different health care institutions in Colombia, the assessment of a PET-CT using the proposed methodology.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124453047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development of fabrication method for a phantom emulating breast tumor tissue for percutaneous antenna coupling measurements in microwave thermotherapy 微波热疗中用于经皮天线耦合测量的模拟乳腺肿瘤组织的制作方法

2015 Pan American Health Care Exchanges (PAHCE) Pub Date : 2015-03-23 DOI: 10.1109/PAHCE.2015.7173352

J. López, L. Leija, A. Vera

{"title":"Development of fabrication method for a phantom emulating breast tumor tissue for percutaneous antenna coupling measurements in microwave thermotherapy","authors":"J. López, L. Leija, A. Vera","doi":"10.1109/PAHCE.2015.7173352","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173352","url":null,"abstract":"Breast cancer is one of the most common diseases and has high mortality among Mexican women. Thermic therapies are one of the most promising techniques these days. Microwave ablation transmits electromagnetic energy inducing a focalized temperature increment to achieve tumor necrosis in a minimally invasive way. One of the main limitations in the development of thermotherapy percutaneous applicators is the measurement of certain parameters in biological tissue. The proposed solution is the fabrication of a phantom that emulates the dielectric properties (permittivity and conductivity) of breast tumor tissue in order to make coupling measurements of the applicator in an experimental setting. A methodology for the fabrication and measurement of a breast tumor phantom was developed, achieving, with low error, the imitation of dielectric properties of the breast tumor tissue reported in the literature. The use of low-cost materials and the simplicity of the methodology allow reproducibility of the phantom for experimentation in the fields of diagnostic and treatment of breast cancer through RF in the microwave range.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132882336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1